Person who dicided to go to weekend trip should not exceed
8 hrs driving in a day. Average speed of forward journey is
40 miles/hour . Due to traffic in sundays ,in return journey
average speed is 30mph.How far he can select a picnic spot?
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Answer / ranjan
Let the journey distance be : x miles
Now x/40+x/30=8 (time=distance/speed)
Solving this for x we get. x=960/7
therefore, x=137(approx)
(137.14 exact)
| Is This Answer Correct ? | 34 Yes | 4 No |
Answer / john doe
Ranjan:
No need to overcomplicate this.
Your formula of time=distance/speed is correct, which means distance=(time)(speed).
The slowest speed he will be driving in a day is 30mph, which limits his distance more than 40mph. Therefore, 30mph is the only speed that needs to be taken into account. With this, we can conclude:
D=(T)(S)
D=(8hr)(30mph)
D=240miles
240 miles is the furthest he can travel home on Sunday, which is the furthest he should travel for his picnic.
| Is This Answer Correct ? | 1 Yes | 2 No |
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